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What is the procedure for namenode recovery?
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If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
What happens when two clients try to access the same file in the hdfs?
Why would nosql be better than using a sql database? And how much better is it?
What are the Hadoop features extended to its eco-system components ?
Why cloudera is used?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
What is a record reader?
What is the relationship between Jobs and Tasks in Hadoop?
What is job tracker role in hadoop?
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What is Slot in Hadoop v1? Why was it removed from Hadoop v2?
Explain how do you overwrite replication factor?
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